Special Offers for Hard-to-Find Materials & Custom Sizes

DLSS supports urgent, non-standard, and corrosion-resistant piping projects with special materials, custom sizes, and flexible inspection requirements.

DLSS Here We Help Special Offers

When Standard Sizes Are Not Enough

Many heat exchanger, shipbuilding, petrochemical, and maintenance projects require materials or sizes that are not easy to find from standard stock. DLSS helps customers handle special material grades, non-standard dimensions, urgent replacement orders, and project inspection requirements.

Urgent replacement and fast sourcing support

Nickel alloy, duplex, titanium, copper nickel available

Custom OD, WT, length, radius, and machining

TPI, PMI, UT, ET, HT, MTC 3.1/3.2 support

Special Materials We Support

Not sure which material is suitable? Send us your working temperature, medium, pressure, and drawing. Our team can help check the possible material options.

Stainless Steel

304 / 304L
316 / 316L
321 / 321H
347 / 347H
310S
904L

Duplex & Super Duplex

S31803 / 2205
S32205
S32750 / 2507
S32760
S31254 / 254SMO

Nickel Alloys

Inconel 600 / 625
Incoloy 800H / 825
Hastelloy C276 / C22
Monel 400
Alloy 20
Nickel 200 / 201

Titanium & Copper Alloys

Titanium Grade 2
C70600
C71500
C68700
C44300
C12200

Custom Sizes & Non-standard Requirements

Based on drawings or technical specifications

Requirement	DLSS Support
Outside Diameter	Custom OD according to project requirements
Wall Thickness	Thin-wall and thick-wall options
Length	Fixed length, random length, extra-long tubes
U Tube Radius	Custom bending radius based on drawing
Finned Tube Design	Low fin, spiral fin, corrugated tube options
Flange Size	Non-standard thickness, bore, length, facing
Tube Sheet	Drilling, machining, drawing-based production
Packing	Wooden case, bundle, export seaworthy packing

Special Supply for Heat Exchanger Projects

Heat Exchanger Tubes

Straight tubes for condensers, boilers, evaporators, and pressure equipment.

U Tubes

Custom bending radius, fixed leg length, stress relief heat treatment, and wooden case protection.

Low Finned Tubes

For heat transfer efficiency improvement in condensers, coolers, and boiler-related equipment.

Tube Sheets

Customized drilling, machining, material matching, and drawing-based production.

Flanges & Fittings

Matching flanges, elbows, reducers, tees, forged fittings, and project piping components.

For replacement projects, DLSS can help match the original material, size, inspection standard, and packing method to reduce project risk.

Inspection & Project Documents Available

Inspection / Document	Available Support
MTC	EN 10204 3.1 / 3.2
PMI	Positive Material Identification
UT	Ultrasonic Testing
ET	Eddy Current Testing
HT	Hydrostatic Test
Flattening / Flaring	For tube quality verification
Visual Inspection	Surface and dimension checking
TPI	BV, SGS, TUV, LR, ABS, DNV etc.
Packing Documents	Packing list, photos, marking, shipping documents

How DLSS Supports Special Projects

How Stainless Steel Tubes

Introduction South America’s growing energy demand is driving the expansion of both conventional and renewable power plants. Whether it’s a thermoelectric station in Brazil or a biomass facility in Chile, one common requirement persists: reliable, long-lasting piping systems. Stainless steel seamless tubes are essential in these operations, especially in heat recovery systems, boiler circuits, and […]

Stainless Steel Tubing for

Why Green Energy Systems Need Advanced Tubing Materials As the world transitions to low-carbon technologies, components like stainless steel tubes play a vital role in wind turbines, hydrogen production, carbon capture units, and biofuel systems. These environments demand materials that resist corrosion, pressure, vibration, and outdoor exposure over decades. From internal cooling circuits in offshore […]

Precision Delivered: Super Duplex

At DLSS (Zhejiang Daling Special Steel Co., Ltd.), we take pride in transforming customer requirements into high-performance stainless steel solutions. Recently, we successfully fulfilled a custom order for Super Duplex Stainless Steel (UNS S32750) Tie Rods and Hex Nuts, tailored precisely to our client’s technical drawings and application needs. Project Overview Strict Quality Requirements Met […]

Inconel 625 Seamless Tubes:

Introduction Inconel 625 seamless tubes are high-performance nickel-chromium-molybdenum-niobium alloys known for their extraordinary strength, thermal stability, and corrosion resistance. These tubes are widely used in marine environments, offshore oil & gas platforms, nuclear systems, and chemical process plants, especially where chloride-induced pitting, stress corrosion cracking, or elevated temperatures are major concerns. See: Inconel – Wikipedia […]

Customer Request	DLSS Response
“We need nickel alloy tubes urgently.”	Check stock, mill schedule, and air shipment option
“The size is not standard.”	Review drawing and confirm production feasibility
“We need U tubes with fixed radius.”	Confirm radius, leg length, heat treatment, and packing
“The end user requires TPI.”	Coordinate BV, SGS, TUV, LR, ABS, or DNV inspection
“We only need a small quantity.”	Check sample, trial order, or small-batch support
“We need replacement tubes for an old exchanger.”	Match material, size, standard, and inspection requirements

FAQ

Can DLSS supply non-standard sizes?

Yes. DLSS can support customized OD, wall thickness, length, bending radius, flange dimensions, and drawing-based production.

Do you support small quantity orders?

For special materials or replacement projects, DLSS can check stock, sample availability, or small-batch production based on the requirement.

Can you arrange third-party inspection?

Yes. DLSS can coordinate third-party inspection such as BV, SGS, TUV, LR, ABS, and DNV according to project requirements.

What information should I provide for a special offer?

Please provide material grade, size, quantity, drawing, standard, inspection requirement, delivery time, and destination port.

Can DLSS support urgent air shipment?

For urgent replacement or maintenance projects, DLSS can help check stock, production feasibility, packing schedule, and air shipment options.

Do you provide material alternatives?

DLSS can help review the project condition and discuss possible material options, but final material selection should be confirmed by the project engineer or end user.

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